t of the excitement, one of the cars broke out of line and crept to the very end of the pavement.

"Listen, Mister," Penny began indignantly to the driver. "You'll have to back up. You can't cross--" she broke off as she recognized the man at the wheel. "Dad! Well, for Pete's sake!"

"Penny!" the newspaper man exclaimed, no less dumbfounded. "What are you and Louise doing here? And in those wet clothes?"

"Policing the bridge. Dad, there's a big story for you here! A saboteur just blew up one of the piers by ramming it with a motorboat!"

"I thought I heard an explosion as I was driving down Clark Street!" exclaimed Mr. Parker. Opening the car door, he leaped out and wrapped his overcoat about Penny's shivering shoulders. "Now tell me exactly what happened."

As calmly as they could, the girls reported how the saboteur had dynamited the bridge.

"This is a front page story!" the newspaper owner cried jubilantly. "Penny, you and Louise take my car and scoot for home. When yo